Step
| Action
| Normal Result(s)
| Abnormal Result(s)*
|
1
| Check the
master cylinder fluid level.
| Master cylinder fluid level between ADD and FULL.
| Master Cylinder
Reservoir Low
|
2
| Perform
Vacuum Booster Functional Test. Refer to Vacuum Booster Diagnosis .
| Brake pedal falls
away and then pushes back.
| Accumulator Leak-Down System Not Holding Charge
|
3
|
- Turn ignition OFF.
- Park brake not applied.
- Start the engine.
| Brake warning indicator
illuminates briefly (approximately 5 seconds).
|
| • | Brake Warning Indicator Always ON |
| • | Brake Warning Indicator Inoperative |
|
4
| With the
vehicle in PARK, perform Brake Pedal Travel Test. Refer to
Brake Pedal Travel
.
|
| • | Brake pedal moves steadily towards floor, approximately 2-3 in. |
| • | Brake pedal stops and is firm against the pressure (Hydraulic
brake booster may hiss or clunk/click/clatter with high brake pedal effort). |
|
| • | Brake Pedal Excessive Travel |
| • | Brake Pedal Travel Gradually Increases |
| • | Brake Pedal Excessive Effort |
| • | Hydraulic Brake Booster Noisy |
|
5
| Release
the brake pedal.
| Brake pedal returns to normal height.
| Brake Pedal Slow Return
|
6
|
- Press the brake pedal.
- Shift vehicle into DRIVE.
- Perform Brake System Test. Refer to
Brake System Testing
.
|
| • | Braking action starts after applying the brakes. |
| • | Brakes do not grab - brake pedal does not vibrate. |
| • | Vehicle stops without excessive pedal effort. |
| • | Vehicle stops without pulling to one side. |
| • | Front and rear brakes apply evenly. |
| • | Vehicle stops without noise coming from the brakes. |
| • | Vehicle stops without noise coming from the hydraulic booster. |
| • | Brakes do not drag after releasing the brake pedal. |
| • | Brakes do not make noise while driving. |
|
| • | Brake System Slow Response |
| • | Brake Pedal Excessive Effort |
| • | Braking Uneven - Side to Side |
| • | Braking Uneven - Front to Rear |
| • | Brake System Noise with Brakes Applied |
| • | Brake System Groan at End of Stop |
| • | Hydraulic Brake Booster Noisy |
| • | Brakes System Noise with Brakes Not Applied |
|
* Refer to the appropriate symptom diagnostic table for the applicable
abnormal result.
|
